Cardiff City will ship out four players before the transfer window closes if Neil Warnock and the club hierarchy get their way.

Lee Tomlin, Anthony Pilkington , Stuart O'Keefe and Omar Bogle are the main candidates to depart this summer, with none of them due to receive numbers or be named in Warnock's 25-man Premier League squad.

With the Cardiff boss still keen to bring in additions too, possibly on a permanent deal as he hinted after the game against Rotherham , making money from sales could be vital to boosting club coffers.

The Bluebirds have only let players leave on free transfers this summer so far: Greg Halford, Matty Kennedy and Frederic Gounongbe all released after their contracts expired.

After signing Tomlin from Bristol City for an initial £1.5million - plus add-ons that may have taken the final fee to around £3million - Cardiff could recoup virtually the entire sum if they can entice interested party Nottingham Forest to plump for a permanent deal.

The City Ground club have shown interest in Tomlin throughout the summer, though a loan deal has always looked more likely because of the playmaker's substantial wages.

Aitor Karanka is a big fan but whether he's willing to pay the £2.7million that, according to Transfermarkt , Tomlin is worth remains to be seen.

A loan may suit all parties better with Tomlin still having another two years on his Cardiff deal.

And if the worst happens and the Bluebirds are relegated this season, the 29-year-old could prove a very useful player in the Championship to help them get back up again.

Although Transfermarkt say Pilkington is worth £1.8million, a product of his excellent Championship goal record in the past season or two, Cardiff may have to settle for less.

The former Norwich City man has one more year remaining on his contract in the Welsh capital but you would expect the Bluebirds to accept any bid in the region of £1million for him, possibly less.

Pilkington is another who may go out on loan, however, with Warnock - who did sing the forward's praises last year for some diligent work in training and superb sub appearances - now finally ready to let him leave.

Omar Bogle - £675,000

It would surely cause Warnock some regret if Bogle was to leave 12 months after signing for Cardiff.

Having signed the former Wigan Athletic and Grimsby striker for a fee in the region of £500,000 in August 2017, the Cardiff boss admitted he had a raw but potentially very talented player on his hands.

Cardiff fans have only seen that talent in small glimpses though and the way a loan to Peterborough United panned out in the latter part of 2017/18 (Bogle scored just once) suggests that the 26-year-old won't cut it in the Premier League.

The Bluebirds could recoup the fee they paid and make a small profit, according to Transfermarkt's value of the player, which could tempt Warnock to cash in before the deadline. Championship and League One clubs may be tempted.